CN209727177U - A kind of electromagnetism water meter small amount of flow measuring system - Google Patents
A kind of electromagnetism water meter small amount of flow measuring system Download PDFInfo
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- CN209727177U CN209727177U CN201920734391.8U CN201920734391U CN209727177U CN 209727177 U CN209727177 U CN 209727177U CN 201920734391 U CN201920734391 U CN 201920734391U CN 209727177 U CN209727177 U CN 209727177U
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- water meter
- temperature
- small amount
- electromagnetism water
- sensor
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Abstract
Electromagnetism water meter small amount of flow measuring system, including measurement pipe, microprocessor, electromagnetic sensor, excitation circuit, signal processing module, memory and wireless transport module, it includes excitation input end and signal output end that the electromagnetic sensor, which is mounted on the electromagnetic sensor in measurement pipe, the excitation circuit connects the excitation input end, the signal output end connection signal processing module, the microprocessor is separately connected the signal processing module and the excitation circuit, it further include temperature sensor a, the temperature sensor a connection electromagnetic sensor, the signal output end of the temperature sensor connects microprocessor.The utility model is by the installation of temperature sensor so that the system is suitable for the electromagnetism water meter system of the measurement of tiny flow quantity.
Description
Technical field
The utility model belongs to electromagnetism water meter field, and in particular to the electromagnetism water meter system of small amount of flow measuring.
Background technique
Water meter is largely mechanical, ultrasonic type at present.Abrasion is mechanically had in use, crushing is maximum,
Error is maximum, and intelligence degree is not high.Ultrasonic water meter crushing is bigger than normal, relatively high to installation requirement.Most of electromagnetism in the market
The metered flow of flowmeter is bigger than normal, does not meet the demand of electromagnetism water meter, therefore the metering of electromagnetism water meter tiny flow quantity is electromagnetism water meter
Problem to be solved.
Summary of the invention
The technical problem to be solved by the utility model is to provide a kind of electromagnetism water meters of measurement suitable for tiny flow quantity
System.
The utility model uses following technical scheme to solve above-mentioned technical problem:
Electromagnetism water meter small amount of flow measuring system, including measurement pipe, microprocessor, electromagnetic sensor, excitation circuit, signal
Processing module, memory and wireless transport module, the electromagnetic sensor are mounted on the electromagnetic sensor in measurement pipe and include
Excitation input end and signal output end, the excitation circuit connect the excitation input end, the signal output end connection signal
Processing module, the microprocessor are separately connected the signal processing module and the excitation circuit, further include temperature sensor
The signal output end of a, the temperature sensor a connection electromagnetic sensor, the temperature sensor connect microprocessor.
Preferably, the measurement pipe is equipped with temperature sensor b, and the temperature element of the temperature sensor b is mounted on survey
In buret, the temperature sensor b is used for measuring medium temperature.
Preferably, the electromagnetic sensor includes electromagnetic coil, and the electromagnetic coil is equipped with temperature measuring point, and the temperature passes
The temperature element of sensor a is embedded in the temperature measuring point of electromagnetic coil.
Preferably, the signal processing module includes RC filter circuit, pre-amplification circuit, capacitor filter, double T bands
Filter circuit and level shift circuit are hindered, the signal output end output signal of the electromagnetic sensor is successively filtered by the RC
Circuit, pre-amplification circuit, capacitor filter, double T rejector circuits and level shift circuit.
Preferably, the temperature element is thermocouple, installs shielding line outside the thermocouple.
Preferably, the temperature measuring point of the electromagnetic coil is equipped with fixation hole, and the fixation hole is for installing temperature element.
Preferably, the ADC pin of the signal output end connection microprocessor of the level shift circuit.
Preferably, the signal output end of the level shift circuit is connected with analog-to-digital conversion module.
Compared with prior art, the utility model has the following beneficial effects:
1. temperature can be varied electromagnetism sensor of water meter coil at work, so as to cause the change of transfer efficiency,
If medium temperature does not change, environment temperature does not change, a period of time temperature can be stablized general coil after powering.But
In actual work, medium temperature, environment temperature are possible to change, so as to cause the change of transfer efficiency.General electromagnetism water
Table does not measure coil temperature, this product real-time measurement coil temperature, according to coil temperature come calibrated error, under tiny flow quantity
It can guarantee error in the reasonable scope.
2. electromagnetism water meter is under big flow, medium temperature on flow without influence, but the medium temperature under tiny flow quantity
Variation cannot be ignored, and general electromagnetism water meter does not measure medium temperature, the temperature of this product instrument real-time measurement medium, according to temperature
Degree is to correct measurement result, to ensure that the error of small amount of flow measuring；
3. reasonable amplifying circuit, filter circuit are designed, it can effective filtering interference signals, sharp pulse signal, power frequency
The garbage signal of other frequencies such as signal.
Detailed description of the invention
Fig. 1 is electromagnetism water meter small amount of flow measuring system block diagram；
Fig. 2 is signal processing module block diagram.
Specific embodiment
The structure of the utility model and the course of work are described further with reference to the accompanying drawing.
Such as Fig. 1: electromagnetism water meter small amount of flow measuring system, including measurement pipe, STM32MCU, electromagnetic sensor, excitation electricity
Road, signal processing module, memory and wireless transport module, it includes encouraging that electromagnetic sensor, which is mounted on electromagnetic sensor in measurement pipe,
Magnetic input terminal and signal output end, excitation circuit connect excitation input end, signal output end connection signal processing module, micro process
Device is separately connected signal processing module and excitation circuit, further includes temperature sensor a, temperature sensor a connection electromagnetic sensor,
The signal output end of temperature sensor connects microprocessor.Measurement pipe is equipped with temperature sensor b, the thermometric of temperature sensor b
Element is mounted in measurement pipe, and temperature sensor b is used for measuring medium temperature.
Electromagnetic sensor includes electromagnetic coil, and electromagnetic coil is equipped with temperature measuring point, and the temperature element of temperature sensor a is embedded
In the temperature measuring point of electromagnetic coil.Temperature element is thermocouple, installs shielding line outside thermocouple.The temperature measuring point of electromagnetic coil is equipped with
Fixation hole, fixation hole is for installing temperature element.
Such as Fig. 2: signal processing module includes RC filter circuit, pre-amplification circuit, capacitor filter, double T band resistance filter
Wave circuit and level shift circuit, the signal output end output signal of electromagnetic sensor successively pass through RC filter circuit, preceding storing
Big circuit, capacitor filter, double T rejector circuits and level shift circuit.Microprocessor selects band AD in the present embodiment
MCU, so the signal output end of level shift circuit can directly microprocessor ADC pin.It is more stable in order to convert,
It can also be followed by with external A/D conversion module into microprocessor.
A kind of embodiment of the utility model above described embodiment only expresses, the description thereof is more specific and detailed,
But it should not be understood as limiting the scope of the patent of the utility model.It should be pointed out that for the common of this field
For technical staff, without departing from the concept of the premise utility, various modifications and improvements can be made, these all belong to
In the protection scope of the utility model.
Claims (8)
1. electromagnetism water meter small amount of flow measuring system, including at measurement pipe, microprocessor, electromagnetic sensor, excitation circuit, signal
Module, memory and wireless transport module are managed, it includes encouraging that the electromagnetic sensor, which is mounted on the electromagnetic sensor in measurement pipe,
Magnetic input terminal and signal output end, the excitation circuit connect the excitation input end, at the signal output end connection signal
Module is managed, the microprocessor is separately connected the signal processing module and the excitation circuit, which is characterized in that further includes temperature
Sensor a is spent, the signal output end of the temperature sensor a connection electromagnetic sensor, the temperature sensor connects micro process
Device.
2. electromagnetism water meter small amount of flow measuring system according to claim 1, which is characterized in that the measurement pipe is equipped with
Temperature sensor b, the temperature element of the temperature sensor b are mounted in measurement pipe, and the temperature sensor b is situated between for measuring
Matter temperature.
3. electromagnetism water meter small amount of flow measuring system according to claim 1, which is characterized in that the electromagnetic sensor packet
Electromagnetic coil is included, the electromagnetic coil is equipped with temperature measuring point, and the temperature element of the temperature sensor a is embedded in electromagnetic coil
Temperature measuring point.
4. electromagnetism water meter small amount of flow measuring system according to claim 1, which is characterized in that the signal processing module
Including RC filter circuit, pre-amplification circuit, capacitor filter, double T rejector circuits and level shift circuit, the electricity
The signal output end output signal of Magnetic Sensor successively pass through the RC filter circuit, pre-amplification circuit, capacitor filter,
Double T rejector circuits and level shift circuit.
5. electromagnetism water meter small amount of flow measuring system according to claim 2 or 3, which is characterized in that the temperature element
For thermocouple, shielding line is installed in the thermocouple outside.
6. electromagnetism water meter small amount of flow measuring system according to claim 3, which is characterized in that the survey of the electromagnetic coil
Warm spot is equipped with fixation hole, and the fixation hole is for installing temperature element.
7. electromagnetism water meter small amount of flow measuring system according to claim 4, which is characterized in that the level shift circuit
Signal output end connection microprocessor ADC pin.
8. electromagnetism water meter small amount of flow measuring system according to claim 4, which is characterized in that the level shift circuit
Signal output end be connected with analog-to-digital conversion module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920734391.8U CN209727177U (en) | 2019-05-21 | 2019-05-21 | A kind of electromagnetism water meter small amount of flow measuring system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920734391.8U CN209727177U (en) | 2019-05-21 | 2019-05-21 | A kind of electromagnetism water meter small amount of flow measuring system |
Publications (1)
| Publication Number | Publication Date |
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| CN209727177U true CN209727177U (en) | 2019-12-03 |
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ID=68674684
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920734391.8U Active CN209727177U (en) | 2019-05-21 | 2019-05-21 | A kind of electromagnetism water meter small amount of flow measuring system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112435453A (en) * | 2020-11-03 | 2021-03-02 | 广州理工学院 | Wireless automatic meter reading system |
-
2019
- 2019-05-21 CN CN201920734391.8U patent/CN209727177U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112435453A (en) * | 2020-11-03 | 2021-03-02 | 广州理工学院 | Wireless automatic meter reading system |
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